Method and Arrangement in a Telecommunication System

摘要

A method and an arrangement in a user equipment for reporting Channel State Information, CSI, and a method and an arrangement in a base station for obtaining CSI are provided. The user equipment is in connection with the base station in a cellular communication network. After receiving a receiving a grant in a subframe n to be used for CSI reporting, from the base station, the user equipment determines subframe type of a subframe n+p. The user equipment then reports to the base station, CSI reflecting channel conditions in the subframe type of subframe n+p. p is a variable value.

主权项

1. A method in a user equipment for reporting Channel State Information (CSI) to a base station in a cellular communication network, the method comprising:
receiving, from the base station, in a subframe n, a grant of uplink resources to be used for CSI reporting, determining a subframe type of a subframe n+p, where p is a value or function known to the user equipment and the cellular communication network; and reporting, to the base station, CSI that reflects channel conditions in subframes of the determined subframe type;wherein the determined subframe type is one of two or more subframe types, each of which two or more subframe types is associated with a respective set of different subframes, and wherein the reported CSI reflects channel conditions particular to subframes belonging to the set of subframes associated with the determined subframe type.